306742387 has 4 divisors (see below), whose sum is σ = 350562736. Its totient is φ = 262922040.

The previous prime is 306742379. The next prime is 306742391. The reversal of 306742387 is 783247603.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 306742387 - 2³ = 306742379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306742687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21910164 + ... + 21910177.

It is an arithmetic number, because the mean of its divisors is an integer number (87640684).

Almost surely, 2^306742387 is an apocalyptic number.

306742387 is a deficient number, since it is larger than the sum of its proper divisors (43820349).

306742387 is an equidigital number, since it uses as much as digits as its factorization.

306742387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43820348.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 306742387 is about 17514.0625498483. The cubic root of 306742387 is about 674.4109260268.

It can be divided in two parts, 3067 and 42387, that added together give a palindrome (45454).

The spelling of 306742387 in words is "three hundred six million, seven hundred forty-two thousand, three hundred eighty-seven".